Year	US Dollars adjusted for inflation)
1950	823
1951	828.5
1952	871.9
1953	823.5
1954	885.8
1955	860.2
1956	777.3
1957	778.4
1958	843.6
1959	820.4
1960	865.4
1961	952.4
1962	932.4
1963	999.1
1964	1036
1965	1071
1966	1070
1967	1150
1968	1138
1969	1166
1970	1241
1971	1285
1972	1363
1973	1447
1974	1497
1975	1506
1976	1519
1977	1546
1978	1665
1979	1737
1980	1854
1981	1989
1982	2098
1983	2071
1984	2110
1985	2359
1986	2442
1987	2440
1988	2480
1989	2526
1990	2756
1991	2737
1992	2917
1993	3044
1994	3154
1995	3353
1996	3496
1997	3647
1998	3740
1999	3904
2000	4047
2001	4046
2002	4111
2003	4274